xset s off
Then it won’t blank anymore. Oh and you’ll want to somehow have those commands execute each time your window manager starts up.
So I’ve had my mythtv box running nicely for quite a while now but one annoying thing I couldn’t figure out was how to stop the annoying screen blanking. I’d set various dpms parameters in xorg.conf, turned off the screensaver. But it kept blanking. The most annoying part was that it hadn’t always happened.
Anyhow, I finally found the one command to stop it;
My only (Chinese) new years resolution is to get a new fucking job. Fuck this place.